用C#实现目录拷贝

在C#中没有直接的目录拷贝函数，所以需要遍历源目录，然后逐个目录和逐个文件进行拷贝。以下就是实现代码：

        /// <summary>
        /// Copy files from souce directory to dest directory
        /// </summary>
        /// <param name="SourceDir"></param>
        /// <param name="DestDir"></param>
        /// <returns></returns>
        private bool CopyFilesExt( string SourceDir, string DestDir )
        {
            string[] FileNames = Directory.GetFiles(SourceDir);
            // Copy files into dest dir
            // If file exists, then overwrite
            for(int i = 0; i < FileNames.Length; i++ )
                File.Copy( FileNames[i],
                    DestDir + FileNames[i].Substring( SourceDir.Length ), true );
            return true;
        }
        /// <summary>
        /// Copy sub-directories and files from directory to dest directory
        /// </summary>
        /// <param name="SourceDir"></param>
        /// <param name="DestDir"></param>
        /// <returns></returns>
        private bool CopyDirExt( string SourceDir, string DestDir )
        {
            DirectoryInfo diSource = new DirectoryInfo( SourceDir );
            DirectoryInfo diDest = new DirectoryInfo( DestDir );
            if( diSource.Exists )
            {
                // If dest directory doesn't exist, then create it;
                if( !diDest.Exists )
                    diDest.Create();
                // Copy files from source directory to dest directory
                if( CopyFilesExt( SourceDir, DestDir ) )
                {
                    string[] SubDirs = Directory.GetDirectories( SourceDir );
                    bool bResult = true;
                    // Copy sub-directories
                    for( int i = 0; i < SubDirs.Length; i++ )
                        if( !CopyDir( SubDirs[i] + @"\",
                            DestDir + SubDirs[i].Substring( SourceDir.Length ) + @"\" ) )
                            bResult = false;
                    return bResult;
                }
            }
            return false;
        }
       调用如下即可：

            strSourceDir = txtSourceDir.Text;
            strDestDir = txtDestDir.Text;
            if( strSourceDir[strSourceDir.Length-1] != '\\' )
                strSourceDir += @"\";
            if( strDestDir[strDestDir.Length-1] != '\\' )
                strDestDir += @"\";
            if( !CopyDirExt( strSourceDir, strDestDir ) )
                MessageBox.Show( "Directory copied failed!" );
            else
                MessageBox.Show( "Directory copied successfully!" );
       注意，我的CopyDirExt函数中的目录，是以“\”结束，因此要调用之前，需要根据需要进行补加字符“\”。

本文来自CSDN博客：http://blog.csdn.net/Knight94/archive/2006/03/27/640153.aspx